Series long picks' effects

Hi,

I'm wondering if the following change to the BoX series format would end up in more exciting games: once the champion is picked in a given match in a series, he is unavailable for the remainder of the series. So if you have best of 5 and someone takes Rengar in game 1, it's not available for games 2-5.

The downside is that players will be forced to play with champions they are perhaps not as familiar with. The upside is that we would see more champions in a series, the players will be required to be more flexible and broader their champion pool.

What do you think?